Gas burner



Oct. 18, 1932.

c. w. CAMPBELL ET AL GAS BURNER Filed July 29. 1930 JNVENTORS A TTORNEYJQ Patented Oct. 18,- 1932 UNITED STATES" PA'T'ENT O FICE j CAR-LETON w. CAMPBELL AND siminy J. COOK, 0F DENVER, COLORADO. ASSiGNORS To v BURNAIR, INC., OE DENVER, GOLQRADQ Gas BURNE Application filed Juiy 29, 1930. Serial No.471,4eo.

Our invention relates to gas burners. An important object of the invention istoprovide a simple/and practical gas burner that will produce a maximum of heat from the gas consumed. I

Another Object of the invention is to provide a unit heater of the character mentioned that can be easily manufactured and installed, and which may be usedin any style or shape of furnace. j 7

A further object of the invention is to provide means to pass an air stream through a flame of burning gas to affordcomplete combustion of the gas.-

Another object of'the invention is to dispose our burners in such a way that they project flames toward the vertical wall' of a Water jacket adjacent the bottom thereof.

Still another object of the invention is to provide meansito directall of the air, passing through the furnace grate, to and through the burners thereon."

Other objects reside in detailsof construction and in novel combinations and arrangements of parts, which will more fullyappear in the course of the following description. i

. In the drawing,.like reference characters designate snmlar parts in the several vlews.

- Figure 1 is a horizontal section of a furnace to which embodiments of our invention have been applied. 5 Figure 2 is a broken, vertical-section taken on the line 22 of'Figure -l.

.Figu're 3 is an enlarged elevation of an embodiment of our invention, withthe housing partly broken away.

Figure 4: is a cross section taken on the line 4-4 of Figure 3.

Figure 5 is a broken, diagrammatic sketch of the face of a furnace,-to'which the invention has been applied. 1 V Y Referring more in detail to the drawing, the reference numeral 6 designatesgenerally a furnace to which the present invention has been applied. The flue is shown at 7.1 The furnace has asectional water jacket 8 on the sides and back. :Inlets 9 are shown near the bottom of the jacket for the admission-of cold water into the jacket. .Anoutlet 10 is shown for the water that has been heated b the gas burners, hereinafter to be describe A grate 12 is supported within the furnace, and the furnace has a door 13 fOr the c0mbustion chamber. The furnace normally has an ashrchamber 14 below; the grate 12., In

the present invention,-the chamber 1 1 is for the introduction of air to .thegas burners, rather than for ashes. The Wall of this chamber is indicated at 15. An opening 16 for the ash chamber is usually closed by a door, but with the present invention no door needs to be used.

Disposed on the grate 12 are gas burner units 17 connected in series by a gas supply pipe 18 resting on the grate. A plug 19 is disposed in the end of the gas pipe after it supplies gas to the last unit. 20. It seems apparent without further illustration, that one or *more units maybe connected with separate supply pipes. The pipe 18 is generally introduced into the furnace through a so-called clinker door- 56.

After the units are connectedand placed in'position, the portion of the grate surface 'not covered by them is closed by means of plastic material 22, preferably non-combustible. The plastic material conforms with the contour of the burner units, so that all the air ordinarily passingthroughthe grate l2-will have to pass through the burner units. The plastic material maybe cement, plaster, asbestos plaster, or the like.

Eachunit comprises a housing 23 having a "slotted gas port24, and a slotted secondary air port 25 on a sloping surface 26 of the roof of the unit. The air port 25 is so disposed that it directs an impinging stream ofair against the flamecoming from the gas port 24.

The housing contains longitudinal partitions 27 and 28providing a gas and air mix- 1 ing chamber 29. The gas port 24 is disposed lengthwise of the mixing chamber 29. The partition 27 is spaced from an upright wall of. the housing to provide an elongated air chamber. 31 that feeds air to the port 25.

The mixingchamber 29 has a cuplike depression 32 at the gas inlet. A space 33' in the housingbelow the mixing chamber provides another air. chamber. The supply. pipe injector 36. It seems clear that to increaseordecrease the capacity of the burner, it is only necessary to provide an adapter having a larger or smaller orifice.

The injector has an inner tube 41, the passage of gas. through. which. causes the primary. or initial supply. of air to. be drawn through an opening 42' of the inner tube. The. inner tube projects. into. an. outer tube 43; and is integrally connected thereto, as showne at44'. The outer tube hassections 45 and; 4610f difi'erent diameters connected; by a tapered; portion 47;. The exterior of the section 45 isslightly tapered ext'eriorly tov pro.- vide aclose fit between the injector: and: inlet 48-;of themixing chamber 29. In fact, it is often. preferred to have the tapered. section 45 of the injector support the entire housing '23. and its associated. parts.

The section. 46-.has.laterals air inlets 49 to supply, air fromthe spaces 33;to.the interior of-the outer-tube 43, topasswith the gas into themixing chamber 29. Y

In the operationpf the invention, after the units are connected with. the gas supply 18 andfplacedin;position, the grate surface, eX- terior-of the units, is covered. over with the plastic material 22, which. formsan airtight joint with; the .unit housings.

Gasis then introducediinto the supplypipe and. ignited at; the port. 24. Air is mixed with.the gas at. threedifi'erent points, to wit, first, in.the inner tube41, second, in.the outer tube43, and; third; at; the point of; combus tion. as. indicated by the-arrows50. As the gas-enters. the mixing chamber, it-expands, ELSISllOWIL-bY-fllb arrow 51 inFigure 3.

It ;will be notedthat-thegas portv 24f isnot at the peak 52-of the housing roof; butit is atone side thereof. The advantage of'this arrangement .is that slope of the roof, as shown at 53, causes a turbulence of the gas as notedby the, arrows 54. By this means a more thoroughmixture of the gas andair is obtained.

As stated, thesecondary air emittedfrom the port. 25.imping es upon. the gasescaping from theport 24. The burner units are so disposed. that the burning gas is projected upon the; lower part ofthe water jacket 8, to heat; and circulate] the water; therefrom throughthe heating system..

It is .to be understood that changes may be made. in theconstruction and arrangement of parts without departing from the spirit and scope of the present invention.

It is to be understood without further illustration that the present invention is not limited to use in a hot water heating plant,

ber having a gas outlet discharging across 1.

the path. ot the upwardly ascending air, whereby to, effect a. mixingvof; the air and gas after issuance from; the; burner housing, a gas injector set in the; partition separating the mixing and air chambers, and! means for supplying-gas; to the injector.v

2;. A, gas burnercomprising a housing partitioned to-provide anv upper. mixing chamber and; alower air-chamber havingan upwardly ejecting air outlet, the mixing chamber having a gas outlet discharging. across-the path of the upwardly ascending air, whereby to effect a mixing of: the air and; gas after issuance from the burner housing,,a gas injector set in. the partition; separating the mixing and; air. chambers, and comprisingan. outer tube having lateral: air; inlets in its lower portion, and; an inner upwardly'tapeneditube opening at; its lower endrintoethe air chamber, and means for supplying gas to the lower end of. the inner tube.

3. A gas burner comprising a;housingsha.v ing a. sloping top. portion in; which; are formed. upper.- and: lower outlets,v and parti; tioned; to provide an upper mixing chamber connecting-with. the u pper outlet and a lower air chamber connecting with the lower out:- let, a: gas injector'set: in the. partition. and comprising an outer tube having laterali air inlets in.itslower.-portion, and an inner upwardly tapereditube openingatiitslower. end into the air chamber,.and:means for supplying-gas to the lower-endiotthe-innen tube.

4. A gas burnercomprising-a-housing having a sloping topportion in which are formed upper and lower outlets, and par.- titioned to provideanuppermixing chamber connectingwitlrthe upperoutlet and a lower air chamber connecting with thelower outlet, said. partition having a centrally: disposed cup-shaped depression, an injector set in the depressed portionoffthe partition and comprisingan outer tube having lateral air inlets inits-lower portion and an innerup wardly tapered tube openingat its lower end into the airchamber, and means-for supplying gas-to' the lower end of the=inner tube.

5. A gas burner comprising ahousing having its top reversely; sloped and having upper: and lower: out-letsin one of the sloping portions, and partitioned to provide an upper mixing chamber and a lower air chamber 1 connected with the respective upper and lower outlets, said partition having a central portion depressed, injector set in the de-' pressed portion 01 the partition and com prising inner and outer tubes, the latter hav& ing lateral air inlets in its lower p0rtion,and

the inner tube extending across the lateral.

air inlets and terminating a distance from the top of the outer tube, and means for supplying gas to the inner tube of the injector.

In testimony whereof we hereunto afiix our signatures.

CARLETON W. CAMPBELL. SIDNEY J. COOK. 

